package com.flitsneak.designpatterns.behavioralpatterns.observer;

/**
 * @author flitsneak
 * @email flitsneak@gmail.com
 * @date 2022/7/19 16:20
 * @description
 */
public interface Observable {
    void addObserver(Observer observer);

    void deleteObserver(Observer observer);

    void notifyObservers(String info);
}
